Kalamazoo River, MI

The Kalamazoo River is a river in the U.S. state of Michigan. The river is 166 miles (267 km) long from the headwaters of the southern branch to Lake Michigan. The river's watershed drains an area of approximately 2,020 square miles (5,230 km²) and drains portions of eight counties in southwest Michigan: Allegan, Barry, Eaton, Van Buren, Kalamazoo, Calhoun, Jackson, Hillsdale, Kent and Ottawa. The river has a median flow of 1863 cubic feet per second (52.8 m³/s) at New Richmond, Michigan, upstream from its mouth at Saugatuck, Michigan.

The North and South Branches of the Kalamazoo River originate within a few miles of each other. The South Branch begins near North Adams in Moscow Township in northeastern Hillsdale County and flows north and west through Homer before joining the North Branch at the forks of the Kalamazoo in Albion. The North Branch begins near Farewell and Pine Hills lakes in southern Jackson County and flows north and west through Concord before reaching Albion in Calhoun County. It then flows through Kalamazoo and Allegan counties.

After Albion, the Kalamazoo flows mostly westward through Marshall, Battle Creek, Augusta, Galesburg, Comstock, and Kalamazoo. From Kalamazoo, the river flows mostly north until just before it reaches Plainwell and then flows northwest through Otsego, Allegan, Saugatuck and then into Lake Michigan.